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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Neurophysiol
2014 ; 112
(7
): 1748-62
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One month in the life of a neuron: longitudinal single-unit electrophysiology in
the monkey visual system
#MMPMID24966298
McMahon DB
; Bondar IV
; Afuwape OA
; Ide DC
; Leopold DA
J Neurophysiol
2014[Oct]; 112
(7
): 1748-62
PMID24966298
show ga
Conventional recording methods generally preclude following the activity of the
same neurons in awake animals across days. This limits our ability to
systematically investigate the principles of neuronal specialization, or to study
phenomena that evolve over multiple days such as experience-dependent plasticity.
To redress this shortcoming, we developed a drivable, chronically implanted
microwire recording preparation that allowed us to follow visual responses in
inferotemporal (IT) cortex in awake behaving monkeys across multiple days, and in
many cases across months. The microwire bundle and other implanted components
were MRI compatible and thus permitted in the same animals both functional
imaging and long-term recording from multiple neurons in deep structures within a
region the approximate size of one voxel (<1 mm). The distinct patterns of
stimulus selectivity observed in IT neurons, together with stable features in
spike waveforms and interspike interval distributions, allowed us to track
individual neurons across weeks and sometimes months. The long-term consistency
of visual responses shown here permits large-scale mappings of neuronal
properties using massive image libraries presented over the course of days. We
demonstrate this possibility by screening the visual responses of single neurons
to a set of 10,000 stimuli.